Control of Traffic Signal Phases
First Claim
1. A method for controlling a traffic signal phase at one or more intersections, respectively, comprising:
- configuring a control system at an intersection to operate in one of a first mode or a second mode;
while operating the controller in the first mode, in response to a transit priority signal received by the control system from a vehicle assigned transit priority, extending a green phase of the traffic signal in favor of the vehicle assigned transit priority; and
while operating the control system in the second mode, in response to a transit priority signal received by the control system from the vehicle assigned transit priority, preempting a current non-green phase of the traffic signal to a green phase in favor of the vehicle assigned transit priority.
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Accused Products
Abstract
Controlling a traffic signal phase at one or more intersections. A control system at an intersection is configured to operate in one of a first mode or a second mode. While operating the controller in the first mode, in response to a transit priority signal received by the control system from a vehicle assigned transit priority, a green phase of the traffic signal is extended in favor of the vehicle assigned transit priority. While operating the control system in the second mode, in response to a transit priority signal received by the control system from the vehicle assigned transit priority, a current non-green phase of the traffic signal is preempted to a green phase in favor of the vehicle assigned transit priority.
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Citations
20 Claims
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1. A method for controlling a traffic signal phase at one or more intersections, respectively, comprising:
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configuring a control system at an intersection to operate in one of a first mode or a second mode; while operating the controller in the first mode, in response to a transit priority signal received by the control system from a vehicle assigned transit priority, extending a green phase of the traffic signal in favor of the vehicle assigned transit priority; and while operating the control system in the second mode, in response to a transit priority signal received by the control system from the vehicle assigned transit priority, preempting a current non-green phase of the traffic signal to a green phase in favor of the vehicle assigned transit priority. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for controlling a traffic signal phase at an intersection, comprising:
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a control system at an intersection configurable to operate in one of a first mode or a second mode; two or more traffic signals coupled to the control system; wherein the control system is configured to; extend, in response to a transit priority signal received from a vehicle assigned transit priority while the control system is operating in the first mode, a green phase of one of the two or more traffic signals in favor of the vehicle assigned transit priority; and preempt, in response to a transit priority signal received by the control system from the vehicle assigned transit priority while the control system is operating the control system in the second mode, a current non-green phase of the one of the two or more traffic signals to a green phase in favor of the vehicle assigned transit priority. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system for controlling traffic signal phases of a plurality of respective sets of two or more traffic signals at a plurality of intersections, comprising:
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a management system; a plurality of control systems at the plurality of intersections, respectively, each control system coupled to the management system and individually configurable via the management system to operate in one of a first mode or a second mode; wherein each control system is coupled to one of the respective sets of two or more traffic signals, and each control system is configured to; extend, in response to a transit priority signal received from a vehicle assigned transit priority while the control system is operating in the first mode, a green phase of one traffic signal of the respective set of two or more traffic signals in favor of the vehicle assigned transit priority; and preempt, in response to a transit priority signal received by the control system from the vehicle assigned transit priority while the control system is operating the control system in the second mode, a current non-green phase of the one traffic signal of the respective set of two or more traffic signals to a green phase in favor of the vehicle assigned transit priority.
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Specification